Anti-breaking mobile phone charging wire and preparation method thereof

Abstract

The present application relates to the technical field of charging line, in particular to a kind of anti-fracture mobile phone charging line and preparation method thereof.It includes wire core and the protective layer of wire core insulation protection, protective layer includes the protective layer for reinforcing protection to wire core, the surface of protective layer is provided with skin layer, the surface of skin layer is provided with the braiding layer for increasing overall wear resistance;The reinforcing core is arranged at the center of protective layer, the side wall of reinforcing core is provided with a plurality of support partitions fixedly connected with the inner wall of protective layer, the protective layer is separated into a plurality of wire core grooves by support partition, and wire core is wrapped and arranged in wire core groove.Copolymer PVC-g-MMA is used as the toughness modifier of PVC to improve the anti-fracture performance of PVC, polyimide PI is added to improve the problem that excessive methyl methacrylate MMA self-polymerization phenomenon is aggravated when methyl methacrylate MMA is increased, resulting in the decrease of notched impact strength, polyimide PI and PVC macromolecule form hydrogen bond to increase the stability of PVC, so that the tensile strength of PVC is increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of charging lines, in particular to a mobile phone charging line with anti-fracture function and a preparation method thereof. BACKGROUND

[0002] Charging lines are important components for wired charging of electronic products. In daily life, mobile phones, tablets and other electronic products mainly rely on charging lines for complete charging. Nowadays, mobile phones and other electronic products are used frequently, and the frequency of daily charging has also increased. However, there are still some problems in the long-term charging process of charging lines.

[0003] During the dragging process of the charging line, the surface bending of the charging line is easy to cause skin fracture, leakage or accelerated aging, which is not conducive to the safe use of the charging line. In view of this, the present application provides a mobile phone charging line with anti-fracture function and a preparation method thereof. SUMMARY

[0004] The present application aims to provide a mobile phone charging line with anti-fracture function and a preparation method thereof to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, on the one hand, the present application provides a mobile phone charging line with anti-fracture function, which comprises a core and a protective layer for insulating protection of the core. The protective layer comprises a protective layer for reinforcing protection of the core. The surface of the protective layer is provided with a skin layer. The surface of the skin layer is provided with a woven layer for increasing the overall wear resistance. The protective layer and the skin layer are filled with an elastic buffer material to form a buffer layer.

[0006] The center of the protective layer is provided with a reinforcing core. The side wall of the reinforcing core is provided with a plurality of support partitions fixedly connected with the inner wall of the protective layer. The support partitions divide the protective layer into a plurality of core grooves. The core grooves are wrapped with the core. Each core groove is filled with an insulating material to form an insulating layer.

[0007] Preferably, the protective layer and the support partition are made of silane cross-linked polyethylene material, and the reinforcing core is made of aramid fiber material.

[0008] Preferably, the skin layer is made of blended modified resin, and the blended modified resin comprises the following components in weight fraction: 100 parts by weight of polyvinyl chloride, 8-16 parts by weight of copolymer modifier, 3-10 parts by weight of neutralizing modifier, 10-20 parts by weight of filler, and 1.7-3.2 parts by weight of plasticizer.

[0009] The preparation method of the skin layer is as follows:

[0010] S1.1: take 100 parts by weight of PVC resin and 10-20 parts by weight of filler and other components into a high-speed mixer and stir, the material mixing temperature is not more than 60℃, then continue to stir for about 3min, when the material mixing temperature is automatically increased to 90-100℃, slowly add 1.7-3.2 parts by weight of plasticizer and other components, until the additives are uniformly dispersed and adsorbed on the surface of PVC particles, then take out the PVC mixture for standby;

[0011] S1.2: mix the PVC mixture with 8-16 parts by weight of grafting monomer methyl methacrylate, and carry out melt grafting reaction in a two-roll plasticator, the roller temperature of the two-roll plasticator is in the range of 165-175℃, and the roll gap is 2-3mm, to obtain PVC-g-MMA grafting product, at the same time, add 3-10 parts by weight of neutralizing modifier into the plasticator to obtain a blended modified resin;

[0012] S1.3: use extrusion process to process the blended modified resin through an extruder to form a skin layer of the charging wire.

[0013] As preferred, the copolymer modifier is methyl methacrylate.

[0014] As preferred, the filler includes chlorinated paraffin, titanium white powder and calcium carbonate mixture, and the mixing mass ratio of the chlorinated paraffin, titanium white powder and calcium carbonate is 1:0.5-0.8:1.1-1.3.

[0015] As preferred, the neutralizing modifier is polyimide.

[0016] As preferred, the braided layer uses polyamide fiber material.

[0017] As preferred, on the other hand, the application also provides a preparation method of the anti-breaking charging wire of the mobile phone, which is used for preparing the anti-breaking charging wire of the mobile phone, and the specific steps are as follows:

[0018] S2.1: use single wire drawing process to prepare a core by using a wire drawing machine;

[0019] S2.2: use extrusion process to process and form a protective layer through an extruder, and pass a reinforcing core through the center of the protective layer, pass the core into the protective layer, separate the multiple cores through the core groove, and fill the insulating material in the core groove to fix the core in the core groove;

[0020] S2.3: coat the skin layer on the surface of the protective layer, and fill the elastic buffer material between the protective layer and the skin layer;

[0021] S2.4: wind the braided layer on the surface of the skin layer by braiding to form a complete charging wire.

[0022] Compared with the prior art, the present application has the following advantages:

[0023] 1、In the present application, the blending modified resin is used as the skin layer of the charging wire, and the excellent tensile strength and notched impact strength of the blending modified resin further increase the overall anti-fracture performance of the charging wire.

[0024] 2、In the present application, the skin layer of the charging wire is prepared by mixing the PVC mixture with methyl methacrylate MMA, and adding the neutralizing modifier polyimide PI to obtain the blending modified resin, wherein the polyimide-methyl methacrylate copolymer PVC-g-MMA obtained by grafting polymerization of methyl methacrylate MMA and PVC can be used as a toughness modifier of PVC to improve the anti-fracture performance of PVC, and the polyimide PI added can improve the problem that the self-polymerization of excessive methyl methacrylate MMA is aggravated when the amount of methyl methacrylate MMA is increased, excessive PMMA is generated, and the notched impact strength is reduced, and the polyimide PI and part of the PVC are blended to form a PVC-PI blend, the hydrogen bond between the polyimide PI and the PVC macromolecule increases the stability of the PVC, and the tensile strength of the PVC is increased. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic view of the charging wire in the present application.

[0026] The meanings of the various reference numbers in the figure are as follows:

[0027] 1, core; 2, protective layer; 201, support partition; 202, reinforcing core; 3, skin layer; 4, braided layer. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0030] Referring to Figure 1 As shown in the drawings, the present application provides a kind of anti-fracture mobile phone charging line, including wire core 1 and the protective layer of the insulation protection of wire core 1, protective layer includes the protective layer 2 for reinforcing protection of wire core 1, protective layer 2 surface is provided with skin layer 3, skin layer 3 surface is provided with woven layer 4 for increasing overall wear resistance, woven layer 4 adopts polyamide fiber material, for increasing friction resistance, reduce the risk of fracture due to friction, protective layer 2 and skin layer 3 between filling elastic buffer material, form buffer layer;

[0031] Wherein, the center of protective layer 2 is provided with reinforcing core 202, the side wall of reinforcing core 202 is provided with a plurality of support partitions 201 fixedly connected with the inner wall of protective layer 2, which separates a plurality of wire cores 1, reduces the friction between wire cores 1, and further improves the overall strength of the charging line, the protective layer 2 is divided into a plurality of wire core grooves by the support partitions 201, and the wire core 1 is wrapped in the wire core groove.

[0032] Protective layer 2 and support partition 201 are made of silane cross-linked polyethylene material, and reinforcing core 202 is made of aramid fiber material, which can increase the overall strength of the charging line and increase the anti-fracture ability.

[0033] Skin layer 3 adopts blended modified resin, and the blended modified resin includes the following components by weight: 100 parts by weight of polyvinyl chloride, 8-16 parts by weight of copolymer modifier, 3-10 parts by weight of neutralizing modifier, 10-20 parts by weight of filler, 1.7-3.2 parts by weight of plasticizer; wherein, the neutralizing modifier is polyimide PI, the copolymer modifier is methyl methacrylate MMA, the filler includes chlorinated paraffin, titanium dioxide and calcium carbonate mixture, and the mixed mass ratio of chlorinated paraffin, titanium dioxide and calcium carbonate is: 1:0.5-0.8:1.1-1.3

[0034] Example 1

[0035] A method for preparing an anti-fracture mobile phone charging line is as follows:

[0036] S2.1: Adopting single wire drawing process, using wire drawing machine to prepare wire core 1;

[0037] S2.2: Adopting extrusion process, processing protective layer 2 into shape through extruder, and inserting reinforcing core 202 at the center of protective layer 2, inserting wire core 1 into protective layer 2, separating multiple wire cores 1 through wire core groove, and filling insulation material in wire core groove to fix wire core 1 in wire core groove;

[0038] S2.3: Covering skin layer 3 on the surface of protective layer 2, and filling elastic buffer material between protective layer 2 and skin layer 3;

[0039] S2.4: Winding braided layer 4 on the surface of skin layer 3 by braiding to make complete charging wire.

[0040] The preparation method of skin layer 3 is as follows:

[0041] S1.1: Take 100 parts by weight of PVC resin and 16 parts by weight of filler and other components into a high-speed mixer for stirring, and the material mixing temperature should not exceed 60℃, then continue stirring for about 3min, when the material mixing temperature automatically rises to 90-100℃, slowly add 2.6 parts by weight of plasticizer and other components, until the additives are uniformly dispersed and adsorbed on the surface of PVC particles, then take out the PVC mixture for standby;

[0042] S1.2: Mix the PVC mixture with 12 parts by weight of grafting monomer methyl methacrylate MMA, and carry out melt grafting reaction in a two-roll plasticator, the roller temperature of the two-roll plasticator is in the range of 165-175℃, and the roller spacing is 2-3mm, to prepare PVC-g-MMA grafting product, at the same time, add 7 parts by weight of neutralizing modifier PI into the plasticator to prepare blended modified resin;

[0043] S1.3: Using extrusion process, processing blended modified resin into shape through extruder, and using the material as the skin layer 3 of charging wire.

[0044] Example 2

[0045] A preparation method of a breakage-proof mobile phone charging wire is as follows:

[0046] S2.1: Adopting single wire drawing process, using wire drawing machine to prepare wire core 1;

[0047] S2.2: Adopting extrusion process, processing protective layer 2 into shape through extruder, and inserting reinforcing core 202 at the center of protective layer 2, inserting wire core 1 into protective layer 2, separating multiple wire cores 1 through wire core groove, and filling insulation material in wire core groove to fix wire core 1 in wire core groove;

[0048] S2.3: The skin layer 3 is wrapped on the surface of the protective layer 2, and an elastic buffer material is filled between the protective layer 2 and the skin layer 3;

[0049] S2.4: The braided layer 4 is wound on the surface of the skin layer 3 by braiding to make a complete charging line.

[0050] The preparation method of the skin layer 3 is as follows:

[0051] S1.1: 100 parts by weight of PVC resin and 16 parts by weight of filler and other components are added to a high-speed mixer and stirred, and the material mixing temperature is not higher than 60°C, then continue to stir for about 3 min, when the material mixing temperature automatically rises to 90-100°C, slowly add 2.6 parts by weight of plasticizer and other components, until the additives are uniformly dispersed and adsorbed on the surface of the PVC particles, then take out the PVC mixture for use;

[0052] S1.2: The PVC mixture is mixed with 8 parts by weight of grafting monomer methyl methacrylate MMA, and a melt grafting reaction is carried out in a two-roll plasticator, the roller temperature of the two-roll plasticator is in the range of 165-175°C, and the roller spacing is 2-3 mm, to obtain a PVC-g-MMA grafting product, at the same time, 3 parts by weight of neutralizing modifier PI is added to the plasticator to obtain a blended modified resin;

[0053] S1.3: The blended modified resin is processed by an extruder to form a skin layer 3 of the charging line.

[0054] Example 3

[0055] A preparation method of a mobile phone charging line with anti-breaking function is as follows:

[0056] S2.1: A single wire drawing process is used to prepare a core 1 by using a wire drawing machine;

[0057] S2.2: An extrusion process is used to process and form a protective layer 2 by an extruder, a reinforcing core 202 is inserted into the center of the protective layer 2, the core 1 is inserted into the protective layer 2, a plurality of core 1s are separated by a core slot, and an insulating material is filled in the core slot to fix the core 1 in the core slot;

[0058] S2.3: The skin layer 3 is wrapped on the surface of the protective layer 2, and an elastic buffer material is filled between the protective layer 2 and the skin layer 3;

[0059] S2.4: The braided layer 4 is wound on the surface of the skin layer 3 by braiding to make a complete charging line.

[0060] The preparation method of the skin layer 3 is as follows:

[0061] S1.1: Take 100 parts by weight of PVC resin and 16 parts by weight of filler and other components into a high-speed mixer and stir, the material mixing temperature is not more than 60℃, then continue to stir for about 3min, when the material mixing temperature is automatically increased to 90-100℃, slowly add 2.6 parts by weight of plasticizer and other components, until the additives are uniformly dispersed and adsorbed on the surface of PVC particles, then take out the PVC mixture for standby;

[0062] S1.2: Mix the PVC mixture with 10 parts by weight of grafting monomer methyl methacrylate MMA, melt grafting reaction in a two-roll plasticator, the roller temperature of the two-roll plasticator is in the range of 165-175℃, and the roll gap is 2-3mm, to prepare PVC-g-MMA grafting product, at the same time, add 6 parts by weight of neutralizing modifier PI into the plasticator to prepare a blended modified resin;

[0063] S1.3: Use extrusion process to process the blended modified resin through the extruder to form the skin layer 3.

[0064] Example 4

[0065] A method for preparing a mobile phone charging cable with anti-breaking function is as follows:

[0066] S2.1: Use single wire drawing process to prepare the core 1 by using a wire drawing machine;

[0067] S2.2: Use extrusion process to process the protective layer 2 through the extruder to form, and pass the reinforcing core 202 through the center of the protective layer 2, pass the core 1 into the protective layer 2, separate the multiple core 1 through the core groove, and fill the insulating material in the core groove to fix the core 1 in the core groove;

[0068] S2.3: Cover the skin layer 3 on the surface of the protective layer 2, and fill the elastic buffer material between the protective layer 2 and the skin layer 3;

[0069] S2.4: Wind the braided layer 4 on the surface of the skin layer 3 by braiding to make a complete charging cable.

[0070] The preparation method of the skin layer 3 is as follows:

[0071] S1.1: Take 100 parts by weight of PVC resin and 16 parts by weight of filler and other components into a high-speed mixer and stir, the material mixing temperature is not more than 60℃, then continue to stir for about 3min, when the material mixing temperature is automatically increased to 90-100℃, slowly add 2.6 parts by weight of plasticizer and other components, until the additives are uniformly dispersed and adsorbed on the surface of PVC particles, then take out the PVC mixture for standby;

[0072] S1.2: The PVC mixture is mixed with 10 parts by weight of grafting monomer methyl methacrylate MMA, and a melt grafting reaction is carried out in a two-roll plasticator, the roller temperature of the two-roll plasticator is in the range of 165-175℃, and the roll gap is 2-3mm, to obtain a PVC-g-MMA grafting product, and at the same time, 8 parts by weight of neutralizing modifier PI is added to the plasticator to obtain a blended modified resin;

[0073] S1.3: The blended modified resin is processed into a shape by an extrusion process, and the material is used as the skin layer 3 of the mobile phone charging cable.

[0074] Example 5

[0075] A method for preparing a mobile phone charging cable with anti-breaking function is as follows:

[0076] S2.1: A wire core 1 is prepared by using a single wire drawing process and a wire drawing machine;

[0077] S2.2: The protective layer 2 is processed into a shape by an extrusion process, the reinforcing core 202 is inserted into the center of the protective layer 2, the wire core 1 is inserted into the protective layer 2, a plurality of wire cores 1 are separated by wire core grooves, and the wire core 1 is fixed in the wire core groove by filling the wire core groove with insulating material;

[0078] S2.3: The skin layer 3 is wrapped around the surface of the protective layer 2, and an elastic buffer material is filled between the protective layer 2 and the skin layer 3;

[0079] S2.4: The braided layer 4 is wound around the surface of the skin layer 3 by braiding to form a complete charging cable.

[0080] The preparation method of the skin layer 3 is as follows:

[0081] S1.1: 100 parts by weight of PVC resin and 16 parts by weight of filler and other components are added to a high-speed mixer and stirred, the material mixing temperature is not higher than 60℃, then the stirring is continued for about 3min, when the material mixing temperature automatically rises to 90-100℃, 2.6 parts by weight of plasticizer and other components are slowly added, until the additives are uniformly dispersed and adsorbed on the surface of the PVC particles, then the PVC mixture is taken out for standby;

[0082] S1.2: The PVC mixture is mixed with 14 parts by weight of grafting monomer methyl methacrylate MMA, and a melt grafting reaction is carried out in a two-roll plasticator, the roller temperature of the two-roll plasticator is in the range of 165-175℃, and the roll gap is 2-3mm, to obtain a PVC-g-MMA grafting product, and at the same time, 8 parts by weight of neutralizing modifier PI is added to the plasticator to obtain a blended modified resin;

[0083] S1.3: Using the extrusion process, the blended modified resin is processed by the extruder to form the skin layer 3 of the charging line.

[0084] Example 6

[0085] A method for preparing a breakage-proof mobile phone charging line is as follows:

[0086] S2.1: Using the single-wire drawing process, the wire core 1 is prepared by using a wire drawing machine;

[0087] S2.2: Using the extrusion process, the protective layer 2 is processed by the extruder to form the wire core 1, and the reinforcing core 202 is inserted into the center of the protective layer 2. The wire core 1 is inserted into the protective layer 2, and the multiple wire cores 1 are separated by the wire core slot. The insulating material is filled in the wire core slot to fix the wire core 1 in the wire core slot;

[0088] S2.3: The skin layer 3 is wrapped on the surface of the protective layer 2, and the elastic buffer material is filled between the protective layer 2 and the skin layer 3;

[0089] S2.4: The braided layer 4 is wound on the surface of the skin layer 3 by braiding to form a complete charging line.

[0090] The preparation method of the skin layer 3 is as follows:

[0091] S1.1: 100 parts by weight of PVC resin and 16 parts by weight of filler and other components are added to a high-speed mixer and stirred. The material mixing temperature is not higher than 60℃, and then the stirring is continued for about 3min. When the material mixing temperature automatically rises to 90-100℃, 2.6 parts by weight of plasticizer and other components are slowly added until the additives are uniformly dispersed and adsorbed on the surface of the PVC particles. Then the PVC mixture is taken out for standby;

[0092] S1.2: The PVC mixture is mixed with 16 parts by weight of graft monomer methyl methacrylate MMA, and the melt grafting reaction is carried out in a two-roll plasticator. The roller temperature of the two-roll plasticator is in the range of 165-175℃, and the roller spacing is 2-3mm. The PVC-g-MMA grafting product is prepared. At the same time, 10 parts by weight of neutralizing modifier PI is added to the plasticator to prepare a blended modified resin;

[0093] S1.3: Using the extrusion process, the blended modified resin is processed by the extruder to form the skin layer 3 of the charging line.

[0094] Example 7

[0095] A method for preparing a breakage-proof mobile phone charging line is as follows:

[0096] S2.1: Using the single-wire drawing process, the wire core 1 is prepared by using a wire drawing machine;

[0097] S2.2: The protective layer 2 is processed by an extrusion process, the reinforcing core 202 is inserted into the center of the protective layer 2, the wire core 1 is inserted into the protective layer 2, a plurality of wire cores 1 are separated by the wire core groove, and the wire core 1 is fixed in the wire core groove by filling the insulating material in the wire core groove;

[0098] S2.3: The skin layer 3 is wrapped on the surface of the protective layer 2, and the elastic buffer material is filled between the protective layer 2 and the skin layer 3;

[0099] S2.4: The braided layer 4 is wound on the surface of the skin layer 3 by braiding to make a complete charging wire.

[0100] The preparation method of the skin layer 3 is as follows:

[0101] S1.1: 100 parts by weight of PVC resin and 16 parts by weight of filler and other components are added to a high-speed mixer and stirred, the material mixing temperature is not more than 60°C, then continue to stir for about 3 min, when the material mixing temperature automatically rises to 90-100°C, slowly add 2.0 parts by weight of plasticizer and other components, until the additives are uniformly dispersed and adsorbed on the surface of the PVC particles, then take out the PVC mixture for standby;

[0102] S1.2: The PVC mixture is mixed with 12 parts by weight of grafting monomer methyl methacrylate MMA, and the melt grafting reaction is carried out in a two-roll plasticator, the roller temperature of the two-roll plasticator is in the range of 165-175°C, and the roller spacing is 2-3 mm, to obtain a PVC-g-MMA grafting product, at the same time, 7 parts by weight of neutralizing modifier PI is added to the plasticator to obtain a blended modified resin;

[0103] S1.3: The blended modified resin is processed by an extrusion process, and the material is used as the skin layer 3 of the charging wire.

[0104] Example 8

[0105] A preparation method of a break-resistant mobile phone charging wire is as follows:

[0106] S2.1: A wire core 1 is prepared by a single filament drawing process using a wire drawing machine;

[0107] S2.2: The protective layer 2 is processed by an extrusion process, the reinforcing core 202 is inserted into the center of the protective layer 2, the wire core 1 is inserted into the protective layer 2, a plurality of wire cores 1 are separated by the wire core groove, and the wire core 1 is fixed in the wire core groove by filling the insulating material in the wire core groove;

[0108] S2.3: The skin layer 3 is coated on the surface of the protective layer 2, and the elastic buffer material is filled between the protective layer 2 and the skin layer 3;

[0109] S2.4: The braided layer 4 is wound on the surface of the skin layer 3 by braiding to form a complete charging wire.

[0110] The preparation method of the skin layer 3 is as follows:

[0111] S1.1: 100 parts by weight of PVC resin and 14 parts by weight of filler and other components are added into a high-speed mixer and stirred, and the material mixing temperature is not more than 60℃, then continue to stir for about 3min, when the material mixing temperature is automatically increased to 90-100℃, slowly add 2.6 parts by weight of plasticizer and other components, until the additives are uniformly dispersed and adsorbed on the surface of the PVC particles, then take out the PVC mixture for standby;

[0112] S1.2: The PVC mixture is mixed with 12 parts by weight of grafting monomer methyl methacrylate MMA, and the melt grafting reaction is carried out in a two-roll plasticator, the roller temperature of the two-roll plasticator is in the range of 165-175℃, and the roller distance is 2-3mm, and the PVC-g-MMA grafting product is prepared, at the same time, 7 parts by weight of neutralizing modifier PI is added into the plasticator to prepare a blended modified resin;

[0113] S1.3: The blended modified resin is processed into a skin layer 3 by using an extruder, and the material is used as the skin layer 3 of the charging wire.

[0114] Comparative Example 1

[0115] The method of Example 1 is used to prepare the skin layer 3 using unmodified PVC resin.

[0116] Comparative Example 2

[0117] The method of Example 1 is used to remove the neutralizing modifier PI.

[0118] Comparative Example 3

[0119] The method of Example 1 is used to remove the methyl methacrylate MMA.

[0120] The skin layer 3 prepared by the application has good wear resistance and tensile strength, and the specific detection is shown in the following table:

[0121] Mechanical property test method:

[0122] The skin layer 3 prepared in the above Examples 1-8 and Comparative Examples 1-3 is placed in a constant temperature and humidity chamber, and is conditioned for more than 24 hours under the conditions of temperature 23℃ and relative humidity 50%, and then is tested.

[0123] Tensile properties: according to GB / T1040-1992 Experimental Methods for Tensile Properties of Plastics, the tensile speed is 50mm / min; Bending properties: according to GB / T9341-2000 Experimental Methods for Bending Properties of Plastics, the pressure head rate is 1mm / min; Impact properties: according to GB / T1043-93 Experimental Methods for Impact Properties of Plastics Simple Beam; the data obtained are shown in Table 1:

[0124] Table 1 Mechanical property data of skin layer of Examples 1-8 and Comparative Examples 1-3

[0125]

[0126] The above data fully show that, compared with Comparative Examples 1-3, due to the addition of neutralizing modifier PI in the process of mixing the PVC mixture with methyl methacrylate MMA in the skin layer 3 of the present application, the blended modified resin is prepared, and the mechanical properties are obviously improved, wherein the notched impact strength is a value representing the toughness of the material, the larger the value, the better the toughness of the material, and the better the bending properties, as follows:

[0127] By comparing Examples 1-8 with Comparative Examples 1 and 3, it can be seen that:

[0128] The tensile strength of the PVC-g-MMA graft copolymer is greater than that of the PVC processing system without methyl methacrylate MMA. And the tensile strength of the copolymer after grafting reaction is improved compared with that of the ungrafted PVC, and the polyimide-methyl methacrylate copolymer PVC-g-MMA obtained by grafting polymerization can be used as a PVC toughness modifier.

[0129] At the same time, when the content of methyl methacrylate MMA is 12 parts by weight, the tensile strength reaches the maximum;

[0130] When the content of methyl methacrylate MMA is less than 12 parts by weight, and as the content of methyl methacrylate MMA increases, the tensile strength continuously increases;

[0131] When the content of methyl methacrylate MMA is greater than 12 parts by weight, the tensile strength shows a downward trend.

[0132] When the content of methyl methacrylate MMA is small and continuously increases, the number of free radicals of methyl methacrylate MMA increases, the probability of contacting monomers increases, and the role of initiating monomer free radicals will continuously increase, so that methyl methacrylate MMA self-polymerizes into a chain, a part of which is grafted onto the PVC backbone chain, and another part exists in the form of PMMA polymer chain, which has a certain rigidity, which makes the tensile strength of the whole system increase; too much rigidity will cause brittle fracture, thereby causing the decrease of elongation at break.

[0133] Further, it can be seen from the comparison between Example 4 and Example 5 that the mechanical properties of the material change with the increase of the amount of methyl methacrylate MMA;

[0134] When the amount of methyl methacrylate MMA is small, the monomers are surrounded by the free radical initiator as soon as they enter the reaction system, and quickly coagulate into PMMA active chains. Before the monomers have a chance to contact the backbone chains in large quantities, the polymerization of the monomers increases the tensile strength and the bending strength of the system;

[0135] Excessive methyl methacrylate MMA self-polymerization intensifies, generating more PMMA, increasing the packing density of the macromolecules, so that the net chain cannot be uniformly supported and is easily concentrated on the local net chain, macroscopically increasing the brittleness of the material and leading to a decrease in mechanical properties.

[0136] When the increase of methyl methacrylate MMA leads to an increase in initiation efficiency, excessive PMMA is generated, the interface voids between the matrix polymer and the rigid particles increase, and the material is easily damaged, so excessive methyl methacrylate MMA will cause a decrease in notched impact strength.

[0137] It can be seen from the comparison between Examples 1-8 and Comparative Example 2 that:

[0138] With the increase of the amount of polyimide PI added, the impact strength decreases, which is because the number of hydrogen bonds between the oxygen on the imide group of polyimide PI and the hydrogen atoms on the PVC macromolecule increases, thereby reflecting the rigidity of polyimide PI and making the impact strength smaller;

[0139] By adding polyimide PI and mixing in the PVC mixture, the polyimide PI can consume excessive PMMA and copolymerize with PMMA to generate star-shaped diblock copolymer polyisoprene / poly(methyl methacrylate) PI-PMMA, thereby reducing the content of PMMA and improving the problem that the notched impact strength decreases when the amount of methyl methacrylate MMA increases.

[0140] It can be seen from the comparison between Example 1 and Examples 3-4 that the effect of polyimide PI on the impact strength of PVC is a synergistic effect of the two actions. When the amount of polyimide PI added is small, the number of hydrogen bonds formed is small, and the toughening effect plays a dominant role. When the amount of polyimide PI added exceeds a certain peak value, the number of hydrogen bonds between PVC and polyimide PI increases, and the polyimide PI exists in the form of a rigid particle, and the reinforcing effect plays a dominant role, and the impact strength decreases;

[0141] At the same time, after adding the polyimide PI, the polyimide PI is blended with part of the PVC to form a PVC-PI blend, the polyimide PI and the PVC macromolecule form hydrogen bonds to increase the stability of the PVC, the amount of hydrogen chloride removed from the PVC is reduced, the polarity is increased, the tensile strength of the PVC is increased, and the tensile strength is increased with the increase of the addition amount of the polyimide PI.

[0142] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A breakage-proof mobile phone charging cable, comprising a cable core (1) and a protective layer for insulating and protecting the cable core (1), characterized in that: The protective layer includes a protective layer (2) for reinforcing protection of the core (1), the surface of the protective layer (2) is provided with a skin layer (3), the surface of the skin layer (3) is provided with a woven layer (4) for increasing the overall wear resistance, and the protective layer (2) and the skin layer (3) are filled with an elastic buffer material to form a buffer layer; The center of the protective layer (2) is provided with a reinforcing core (202), the side wall of the reinforcing core (202) is provided with a plurality of support partitions (201) fixedly connected with the inner wall of the protective layer (2), the protective layer (2) is divided into a plurality of core grooves by the support partitions (201), the core grooves are wrapped with the core (1), a plurality of cores (1) are separated, the friction between the cores (1) is reduced, and the overall strength of the charging wire is improved, and each core groove is filled with an insulating material to form an insulating layer. The skin layer (3) is made of a blended modified resin, and the blended modified resin comprises the following components in parts by weight: 100 parts by weight of polyvinyl chloride, 8-12 parts by weight of a copolymer modifier, 3-10 parts by weight of a neutralizing modifier, 10-20 parts by weight of a filler, and 1.7-3.2 parts by weight of a plasticizer. The copolymer modifier is methyl methacrylate; and the neutralizing modifier is polyimide. By adding polyimide, the problem of reduced notched impact strength caused by excessive methyl methacrylate self-polymerization and excessive PMMA generation when methyl methacrylate is increased is solved.

2. The break-resistant mobile phone charging cable of claim 1, wherein: The protective layer (2) and the support partition (201) are made of silane cross-linked polyethylene material, and the reinforcing core (202) is made of aramid fiber material; the reinforcing core (202) is used to improve the tensile resistance of the cable, and the aramid fiber material increases the softness of the cable.

3. The anti-breaking mobile phone charging wire according to claim 1, characterized in that: The preparation method of the skin layer (3) is as follows: S1.1: 100 parts by weight of polyvinyl chloride and 10-20 parts by weight of a filler component are added to a high-speed mixer and stirred, the material mixing temperature is not higher than 60℃, then the stirring is continued for 3 min, when the material mixing temperature is automatically increased to 90-100℃, 1.7-3.2 parts by weight of a plasticizer component is slowly added, until the filler and the plasticizer are uniformly dispersed and adsorbed on the surface of the polyvinyl chloride particles, then the polyvinyl chloride mixture is taken out for standby; S1.2: the polyvinyl chloride mixture is mixed with 8-12 parts by weight of a copolymer modifier methyl methacrylate (MMA) in a two-roll plasticator, the roller temperature of the two-roll plasticator is in the range of 165-175℃, and the roller spacing is 2-3 mm, to obtain a PVC-g-MMA grafting product, at the same time, 3-10 parts by weight of a neutralizing modifier is added to the plasticator to obtain a blended modified resin; S1.3: the blended modified resin is processed into a skin layer (3) of the charging wire by an extrusion process.

4. The break-resistant cell phone charging cord of claim 3, wherein: The filler comprises chlorinated paraffin, titanium white powder and calcium carbonate mixture, and the mixed mass ratio of the chlorinated paraffin, titanium white powder and calcium carbonate is 1:0.5-0.8:1.1-1.

3.

5. The break-resistant cell phone charging cord of claim 1, wherein: The braided layer (4) is made of polyamide fiber material.

6. A method for manufacturing the breakage-proof mobile phone charging cable according to any one of claims 1-5, characterized by: The steps are as follows: S2.1: adopting a single fiber drawing process, using a wire drawing machine to prepare a core (1); S2.2: adopting an extrusion process, the protective layer (2) is processed by an extruder to be formed, and a reinforcing core (202) is inserted into the center of the protective layer (2), the core (1) is inserted into the protective layer (2), a plurality of core (1) is separated by a core slot, and the core (1) is fixedly arranged in the core slot by filling the insulating material in the core slot; S2.3: the skin layer (3) is wrapped on the surface of the protective layer (2), and the elastic buffer material is filled between the protective layer (2) and the skin layer (3); S2.4: the braided layer (4) is wound on the surface of the skin layer (3) by braiding to form a complete charging wire.

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